Machine for heating and mixing materials.



O. W. LEVALLEY.

MACHINE FOR HEATING AND MIXING MATERIALS.

APPLICATION FILED JAN.31.1914.

Patented Jan. 5,1915.

2 SHEETS-SHEET 1.

H45 NORRIS PETERS C0,, PHOTO-LVTHQ, WASHINGTON. Dv C.

O. W. LEVALLBY.

MACHINE FOR HEATING AND MIXING MATERIALS. APPLICATION FILED JAN. 31,1914.

1 ,123,901 Patented Jan.5,1915.

2 SHEETSSHEET 2.

NORRIS PETERS 50.. PHOTO-LITHFL WASHINL/IUN, I). 4*

TENT orric.

CHRISTOPHER W. LEVALLEY, 0F MILWAUKEE, WISCONSIN.

MACHINE FOR HEATING AND MIXING MATERIALS.

Specification of Letters Patent.

Patented J an. 5, 1915.

Application filed January 31, 1914. Serial No. 815,751.

To all whom it may concern.

Be it known that I, CHRISTOPHER W. LEVALLEY, a citizen of the UnitedStates, residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements in Machinesfor Heating and Mixing Materials, of which the following is aspecification.

My invention relates to a machine for mixing materials in a highlyheated atmos phere, being designed with especial reference to mixingsuch materials as are em ployed in making asphalt and bituminouspavements.

In the accompanying drawingsFigure 1 is a side view of an apparatusembodying my invention. Fig. 2 is a front view. Figs. 3 and at are crosssectional views of the conduit for the hot gases, taken respectively onthe lines IIIIII and IV-IV of Fig. 2. Fig. 5 is a top plan view ofapparatus embodying the invention, the mixing machine being broken away.

Referring to these drawings, 1 designates a supporting frame which ispreferably a wheel-mounted portable truck. Upon this are supported asteam boiler 2 and a rotary mixing drum 3. This drum is driven by amotor, not shown in the drawings, that may be supplied with steam fromthe boiler 2. The form of mixing drum is largely immaterial, myinvention being adapted to be used in connection with a wide variety ofsuch devices.

For purposes of illustration I have selected the mixing drum andappurtenant apparatus shown in my Patent 1,067,041 of July 8, 1913, forconcrete mixer. This drum is provided at its ends with openings, throughone of which the material to be treated is fed. and through the other ofwhich it is discharged. A. tilting loader 11, pivoted at 17 to bracketsextending forward from the upright framework 5 arranged at the feed endof the machine, is employed to receive the material to be operated uponand deliver it into the mixing drum. The loader is arranged to beoperated by a cable 6, as described in my aforesaid patent.

A canopy 7 surmounts the boiler 3 and receives the products ofcombustion and heated gases from the furnace of the boiler. The usualstack 8 normally conducts the gases away from the canopy for dischargeinto the open air. A conduit 9 communicates with the canopy 7 and isadapted to receive the heated gases from the boiler and deliver theminto the drum 3 in order to produce a highly heated atmosphere thereinin which the mixing operations may take place. The conduit 9 ispreferably doublewalled, as indicated in Fig. 3, to prevent loss of heatby radiation.

22 indicates a valve in the stack 8, and 23 a similar valve in theconduit 9. By means of these the flow of hot gases from the boiler iscontrolled. The two valves are connected by a link 24, and are so setthat when one is open the other is closed. An operating lever 25 and apull rod or cord 29 connected with such lever, are employed to controlthe positions of the valves.

The end of the conduit, 9, that communicates with the drum istelescopic, having an adjustable section 10 that is adapted to be movedso as to cover the feed opening of the drum, or to be raised to uncoversaid opening, when it will slide over the stationary telescoping section16. These telescoping portions of the conduit are preferably rectangularin cross section, as indicated in Fig. i, and, like the rest of theconduit, may be double-walled. By making the telescoping portion of theconduit rectangular as described and shown, several advantages aresecured: In the first place it makes it easy to provide a flat face thatregisters with the feed end of the mixing machine 3; and in. the nextplace this arrangement prevents any twisting or rotative movements ofthe sections relative to each other, and hence insures that the movablesection shall follow a definite path and always come into exact registrywith the end of the mixing drum. The section 10 of the conduit movesjust in front, or outside, of the stationary guard plate 20 that iscustomarily employed at the feed end of the drum between it and theloader 11. The outer end of the conduit, that is, the end adjacent tothe mixing drum, is supported by the framework 5 in any suitableworkmanlike manner, as indicated at 21.

14L is a cable connected at one end. with the movable section 10 of theconduit, and at its other end with the loader, 11. It passes upwardlyfrom the conduit section 10 to a guide pulley 19 in the head frame ofthe apparatus, and thence downwardly past the guiding and directionpulleys 18 and 15, the latter preferably being in the lower part of theframework 5. The cable is connected in any suitable manner with theloader, a convenient arrangement for this purpose being an angle plate12 secured to the side of the loader and perforated to receive anadjusting or tension screw 13 to which the cable 14: is secured. Bymeans of the tension device 13 the position of the movable section canbe accurately adjusted. I

It will be seen from the foregoing description and an examination of thedrawings, that when the loader is lowered into the position indicated inFig. 1, the cable 1 1 will be slackened or moved so as to allow theconduit section 10 to descend and cover the receiving opening into thedrum 3; this movable section being provided with a delivery opening inthat face which is toward the mixing drum, and that accurately registerswith the feed opening into the drum when the parts are in the positionjust mentioned. When the loader is tilted to discharge its contents intothe drum the cable 14; is, by the movements of the loader, drawn ormoved so as to lift the section 10 of the conduit, uncovering the feedopening so that the loader may freely discharge into thevdrum. It willbe seen by reference to the drawings, that the end of the movablesection of the conduit, when lowered, passes the end of the loader; andin order to allow the parts to act without interfering with one another,the end of the section 10 toward the loader tapers downwardly.

It will be understood that the valve 23 should be closed and the valve22 opened whenever the loader is operated to charge the drum, thuscutting ofi the delivery of gases to the conduit 9, as they would beobjectionable and perhaps dangerous to the attendants operating themachine if allowed to escape when the adjustable section of the conduitis removed from the feed end or" the drum.

26 indicates an auxiliary heater that is connected with conduit 9 by aflue 27 in which is located a regulating damper 28. This auxiliaryheater can be used in case the boiler 3 is not operating.

What I claim is l. The combination of a receptacle having a feedopening, a conduit through which hot gases are delivered to the saidreceptacle, having a movable section that is adapted to register withthe feed opening to the receptacle, a loader for delivering material tothe receptacle through the feed opening, and connections between theloader and the said movable section of the conduit arranged to move thelatter from the feed opening when the loader is operated to de liver.

2. The combination of a rotatable mixing receptacle having a feedopening, a loader for delivering material thereto, a conduit throughwhich hot gases are delivered to the receptacle having a telescoping endsection that is adapted to register with the feed opening of the saidrotating receptacle, and connections between the movable telescopicsection of the conduit and the loader ar ranged to move the said sectionwhen the loader is operated to deliver to the receptacle.

3. The combination of a mixing receptacle having a feed opening, aconduit through which hot gases are delivered to the said receptacle,having a telescopic portion rectangular in cross section, the outermember of said section being adjustable and adapted to be moved, so asto either cover the feed opening or to expose the same, independently ofthe movements of the receptacle.

4. The combination of a rotating mixing receptacle, having a feedopening, a tilting loader for delivering material through said openinginto the receptacle, a conduit for heated gases having a telescopicsection at its end, the movable member of which is adapted to cover thesaid feed opening of the mixing receptacle in order to deliver hot gasesthereto, or to be moved to a position uncovering the said opening, andcable connections between the loader and movable telescopic section ofthe conduit arranged to cause the said section to be moved to uncoverthe feed opening when the loader is tilted to deliver into thereceptacle, and to cover the feed opening when the loader is moved toinactive position.

CHRISTOPHER WV. LEVALLEY.

Witnesses C. F. Mnssmenn, H. D. KENNEDY.

Sonics of this patent may be obtained for five cents each. by addressingthe Commissioner of Patents,

' Washington, D. G.

